Gil Martins, an agent with the FBI’s Domestic Terrorism Unit in Houston, confronts the violence generated by extremism every day. But even he is not fully prepared for what he encounters when confronted with evidence of a serial killer who’s calling on the very power of God to dispatch well-known atheists.

Listen to Philip Kerr

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

Don’t see a player here? Click on this link to listen, or right click and “Save As” to download.